SOLUTION: A long distant runner does a first lap around a track in exactly 50 seconds. As she tires each subsequent lap takes 20% longer than the previous ones. How long does she take to r

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: A long distant runner does a first lap around a track in exactly 50 seconds. As she tires each subsequent lap takes 20% longer than the previous ones. How long does she take to r      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1023834: A long distant runner does a first lap around a track in exactly 50 seconds. As she tires each subsequent lap takes
20% longer than the previous ones. How long does she take to run 3 laps.
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52756) About Me  (Show Source):
You can put this solution on YOUR website!
.
A long distant runner does a first lap around a track in exactly 50 seconds. As she tires each subsequent lap takes
20% longer than the previous ones. How long does she take to run 3 laps.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

50 + 60 + 72 = 182 seconds.


Answer by MathTherapy(10549) About Me  (Show Source):
You can put this solution on YOUR website!

A long distant runner does a first lap around a track in exactly 50 seconds. As she tires each subsequent lap takes
20% longer than the previous ones. How long does she take to run 3 laps. 
Time of 1st lap: 50 seconds

Time of 2nd lap: 1.2(50), or 60 seconds

Time of 3rd lap: 1.2(60), or 72 seconds

Total time to run 3 laps: